Battery Powered Melody Machine ECE342-Sp20
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In this project we created a battery powered music box that can play 2 pre-recorded songs or create a song based on a user singing into the microphone. At the heart of the box is an Arduino Uno which does all audio file computations and interactions with the peripherals. Song data is stored on an SD card which communicates with the Arduino via an SD Shield. This data can be quickly accessed by the Arduino, and the frequency of the songs are calculated using an autocorrelation algorithm. The audio is played on a speaker, which features a volume knob and a mute switch. Additionally, optimizations in the order of computations allows the entire system to use a single Arduino. This, along the option of over an hour of battery power, creates a small, easy-to-use music box that can be taken anywhere.
Artifacts
| Name | Description | |
|---|---|---|
| Main PCB Schematic | Eagle Schematic File for main board | Download |
| Main PCB Board File | Eagle file for PCB of main board | Download |
| Battery Board File | Board file for battery | Download |
| Battery Board Schematic | Schematic for Battery Board | Download |
| LED Code | C++ code I used to program the addressable LED array | Download |
| Case .stl File | File of case ready for 3D printing | Download |
| Audio Output Schematic | Schematic for speaker circuit | Download |
| Project Summary | Document detailing our design goals, project timeline, and lessons learned | Download |
| Top-Level Block Diagram | Block diagram of the project with assigned collaborators | Download |
| Black Box Block Diagram | Block diagram describing inputs and outputs of the system | Download |
| Frequency Detection and Interface Code | Handles playback of songs and frequency detection | Download |
| Microphone and Data Management Code | Handles recording audio and data storage read/write | Download |
| Bill of Materials | Bill of all materials used in the project with datasheets | Download |
| Interface Definitions | Table of interfaces between component blocks | Download |
| Customer and Engineering Requirements | Requirements specified for the project | Download |
| Developer Guide | This is a guide PDF designed to help thoroughly explain the Melody Box to a general user or technician | Download |